Cryptococcus gattii VGII isolated from native forest and river in Northern Brazil View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-03-09

AUTHORS

Amaury dos Santos Bentes, Bodo Wanke, Márcia dos Santos Lazéra, Ana Karla Lima Freire, Roberto Moreira da Silva Júnior, Diego Fernando Silva Rocha, Silviane Bezerra Pinheiro, Steven Edward Zelski, Ani Beatriz Jackisch Matsuura, Liliane Coelho da Rocha, Erica Simplício de Souza, João Vicente Braga de Souza

ABSTRACT

BACKGROUND: Cryptococcosis is a global invasive mycosis associated with significant morbidity and mortality. In the northern region of Brazil, this disease is caused by Cryptococcus neoformans genotype VNI and Cryptococcus gattii genotype VGII. However, few environmental studies have been conducted in this large tropical area. AIMS: This study was performed to isolate, genotype, and determine the frequency of cryptococcal agents in environmental samples near Manaus, Amazonas, Brazil. METHODS: A total of 970 environmental samples (290 from soil, 290 from decaying plants, 5 from insects, 280 from the Negro river, and 105 from small streams within the city of Manaus) were collected and plated on Niger seed agar. In addition, 20 sub-cultures obtained from each positive sample were analyzed by PCR-RFLP (URA5) and PCR for genotyping and determination of mating type. RESULTS: Six samples were positive for isolates from the C. gattii species complex. Of those, three samples were from Adolpho Ducke Forest Reserve and three were from the Negro river. All isolates were C. gattii genotype VGII (mating type MATα). CONCLUSION: Genotype VGII proved to be the most important genotype found in the environmental samples. The genotype VGII has been described as one of the most virulent and less susceptible to antifungals and responsible for important outbreaks. This is the first study to demonstrate isolation of C. gattii (VGII) from the Negro river. More... »

PAGES

1-6

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s42770-019-00066-6

DOI

http://dx.doi.org/10.1007/s42770-019-00066-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112673431

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30852797


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42 schema:description BACKGROUND: Cryptococcosis is a global invasive mycosis associated with significant morbidity and mortality. In the northern region of Brazil, this disease is caused by Cryptococcus neoformans genotype VNI and Cryptococcus gattii genotype VGII. However, few environmental studies have been conducted in this large tropical area. AIMS: This study was performed to isolate, genotype, and determine the frequency of cryptococcal agents in environmental samples near Manaus, Amazonas, Brazil. METHODS: A total of 970 environmental samples (290 from soil, 290 from decaying plants, 5 from insects, 280 from the Negro river, and 105 from small streams within the city of Manaus) were collected and plated on Niger seed agar. In addition, 20 sub-cultures obtained from each positive sample were analyzed by PCR-RFLP (URA5) and PCR for genotyping and determination of mating type. RESULTS: Six samples were positive for isolates from the C. gattii species complex. Of those, three samples were from Adolpho Ducke Forest Reserve and three were from the Negro river. All isolates were C. gattii genotype VGII (mating type MATα). CONCLUSION: Genotype VGII proved to be the most important genotype found in the environmental samples. The genotype VGII has been described as one of the most virulent and less susceptible to antifungals and responsible for important outbreaks. This is the first study to demonstrate isolation of C. gattii (VGII) from the Negro river.
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